they had to rely for their existence upon some industrial pursuit, we find them lacking the most essential prerequisite for the efficient struggle for existence--definiteness of purpose, and continuity and persistence of effort. We find them leading a harum-scarum existence, drifting from place to place, and from occupation to occupation, never able to remain at any one undertaking for any length of time. The next features which stand out prominently in the lives of these individuals are their recidivism and the fact that every one of them came under the observation of an alienist on one or more occasions in his life. What is at the bottom of all this? We cannot, of course, deny the very evident fact that these individuals differ from normal man and that this difference is due to their inferiority. But what characterizes this inferiority? Is it the lack of something which normal man possesses, or is it rather a disproportion, a disharmony between the various individual mental faculties of these individuals? In other words, is their inferiority a quantitative or qualitative one? Taking pure intelligence into consideration we find that they show no deficiency in this particular sphere. On the contrary, most or all of them show a degree of shrewdness and keenness which absolutely precludes the existence of an intelligence defect _per se_. Their recidivism is not due to an inability to distinguish between right and wrong. They know very well what is and what is not right, at any rate, as well as the average person, but they feel decidedly different from the average person about this distinction. They are what they are because of a discord, a disproportion between their various psychic attributes. The exaggerated egotism, which is so common to these individuals, serves to establish a pathologic degree of self-consciousness. This in turn makes them feel with an extraordinary keenness the everyday frictions in life, and now the pathologic emotionalism comes into play and being unsupported by any sense of altruism and morality they give way to their feelings in some criminal act. Their pathologic vindictiveness should also be mentioned. A sustained real or imaginary injury can never be forgotten by them. These, in brief, I believe to be the characterological anomalies which distinguish the individuals herein reported from normal man and which at the same time are sufficiently common to all of them to justify their segregation into one distinct group of criminals.